I want to design PCB of a GSM module. Inside a GSM module there is a place to put a (mobile cellular ) SIM card. And then this GSM module can send SMS text messages to different phone numbers.
Basically I want to design a breakout board containing the different chips required in a GSM module. I was able to find a schematic of a GSM module (containing chip SIM900) on the following website:
Here is the schematic download link in the above web page: ftp://imall.iteadstudio.com/Modules/IM120525010_SIM900_module/SCH_IM120525010_GPRS_Module.pdf
OK i I now have the schematic but I am unable to find the individual components (to buy) present in the schematic. Why so ? (Question 1) For example I am unable to find SIM900 standalone chip.
I want to have my own minimalist design of a GSM module because I want to integrate this GSM module with other chips on a single PCB. How can I do that? Is it feasible ? (Question 2)
I can buy that complete GSM module from the market. The complete 'connected' GSM module breakout board containing the SIM900 chip. Yes I can do that. But actually I want to integrate the GSM module board with another different arduino board. So I will need to buy these 2 boards.
But, I want to lower the cost and have my own design of arduino and GSM on a SINGLE PCB. That is why I need to have my own design of GSM module. And thats why I am searching for it.
Let me know if you need any more clarification.